Notch Forming Device Position Alignment for Bookbinding
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Solution Overview
Problem
In bookbinding systems, the lack of consistent notch groove formation on sheet bundles leads to inconsistent adhesive application, resulting in variable booklet quality and potential sheet loss, as the positions and shapes of notch grooves can differ between booklets, affecting adhesive strength and appearance.
Innovation Solution
A notch forming device with a shifting section and control system ensures that the notch positions on the leading sheet of each bundle are aligned, maintaining consistent notch groove formation across multiple booklets, thereby standardizing adhesive application and improving booklet quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If notches are formed on the edge of sheets without position control, then adhesive force between sheet bundle and cover sheet is improved, but notch groove positions vary between booklets leading to inconsistent adhesive application and variable booklet quality
Solution Approach 1:
The notch forming section is made movable in the conveying direction to dynamically adjust its position. The control section moves the notch forming section to a predetermined position before forming notches on sheets, ensuring consistent notch groove positions across all booklets while maintaining the adhesive force benefit of varied notch positions.
Solution Approach 2:
The system changes the positional parameter of the notch forming section based on sheet position detection. By detecting the actual position of sheets and adjusting the notch forming section accordingly, the system achieves precise control over notch groove positions while maintaining consistent adhesive application patterns.
2Strength
If notch positions are shifted for each sheet to create slant form notch grooves, then adhesive strength between sheets is improved through shifted regions, but notch groove positions become inconsistent between booklets affecting appearance and adhesive distribution
Solution Approach 1:
The notch forming section dynamically adjusts its position based on detected sheet positions. This allows the system to create consistent slant-form notch grooves with shifted regions that provide adhesive strength, while ensuring that the overall notch groove positions remain consistent across all booklets for uniform appearance.
Solution Approach 2:
The detection section detects the actual position of sheets, and the control section uses this feedback information to adjust the notch forming section position. This feedback mechanism ensures that notch grooves are formed at consistent positions relative to the sheet edges, maintaining both adhesive strength and appearance consistency across booklets.
3Productivity
If the conveying speed is increased to improve productivity, then booklets are produced faster, but the time available for adhesive application and notching is reduced leading to variable quality
Solution Approach 1:
The notch forming section and adhesive coating section dynamically adjust their operating parameters based on the conveying speed. When conveying speed increases, the system adjusts the notching frequency and adhesive application timing to maintain quality standards while achieving higher productivity.
Solution Approach 2:
The system maintains continuous operation of the notching and adhesive application processes throughout the conveying path. By ensuring that notching and adhesive application occur continuously and consistently regardless of conveying speed, the system achieves high productivity without compromising quality.
Data Source
AI summary
A notch forming device, comprises a notch forming section to form a notch on an edge of a sheet constituting a sheet bundle to be outputted in accordance with an execution of a job; a shifting section to shift a position of a notch to be formed on a sheet by the notch forming section; and a control section to control the shifting section. When plural sheet bundles are outputted in accordance with the execution of the job, the control section controls the shifting section to make a position of a notch on a leading sheet of each sheet bundle at the same position.